T6 Zombies - Plane bug in Mob of the Dead

When you walk up to the plane, it says you can board it, but you cant actually board it.
We could board the plane twice, but the third time (or fourth) this happened. Only one guy went to the plane and he couldn't board it, like 30 seconds later when he said he couldnt, i saw the tank indicators light up as if the plane landed.
Thanks for reading :^)